#ifndef __ALIGNMENT_PATTERN_FINDER_H__
#define __ALIGNMENT_PATTERN_FINDER_H__

/*
 *  AlignmentPatternFinder.h
 *  zxing
 *
 *  Copyright 2010 ZXing authors All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "AlignmentPattern.h"
#include <zxing/common/Counted.h>
#include <zxing/common/BitMatrix.h>
#include <zxing/ResultPointCallback.h>
#include <vector>

namespace zxing {
    namespace qrcode {

        class AlignmentPatternFinder : public Counted {
        private:
            static int CENTER_QUORUM;
            static int MIN_SKIP;
            static int MAX_MODULES;

            Ref<BitMatrix> image_;
            std::vector<AlignmentPattern *> *possibleCenters_;
            int startX_;
            int startY_;
            int width_;
            int height_;
            float moduleSize_;

            static float centerFromEnd(std::vector<int> &stateCount, int end);

            bool foundPatternCross(std::vector<int> &stateCount);

            float crossCheckVertical(int startI, int centerJ, int maxCount,
                                     int originalStateCountTotal);

            Ref<AlignmentPattern> handlePossibleCenter(std::vector<int> &stateCount, int i, int j);

        public:
            AlignmentPatternFinder(Ref<BitMatrix> image, int startX, int startY, int width,
                                   int height,
                                   float moduleSize, Ref<ResultPointCallback> const &callback);

            ~AlignmentPatternFinder();

            Ref<AlignmentPattern> find();

        private:
            AlignmentPatternFinder(const AlignmentPatternFinder &);

            AlignmentPatternFinder &operator=(const AlignmentPatternFinder &);

            Ref<ResultPointCallback> callback_;
        };
    }
}

#endif // __ALIGNMENT_PATTERN_FINDER_H__
